There are many differences between AMD and Intel CPUs. But I will be focusing on few to help you decide which one you want.
AMD and Intel both make processors, but where you put it on your motherboard are completely different. Both companies make their processors differently. Since that is the case, the slot on the motherboard has to be different. So be very careful as choosing one or the other kind of locks down what type of CPU and motherboard you can use. Do also keep in mind, some motherboard manufacturers tend to make the same board, but have one version with an AMD slot and one version with Intel’s slot. So make sure you check which slot your CPU needs and get a motherboard with that slot.
As for the price AMD usually seems to be a better choice. At first glance they seem to have way more cores in their CPS at a cheaper price. But in my experience, that is not the case.
If you double the cores in an Intel CPU, and compare it to an AMD CPU.
For example, a 4 core Intel CPU will perform just as well as an 8 core AMD CPU.
Or another way to look at it is, divide the cores in an AMD CPU by half and compare it to an Intel CPU.
For example, a 16 core AMD CPU will perform just as well as an 8 core Intel CPU.
As for price, AMD is usually cheaper, but I personally prefer Intel for my gaming machine. I find AMD is pretty good too! But I tend to use AMD for more media heavy tasks. Such as running a media server, streaming, or rendering and recording videos. Such as my game play from my gaming pc.
I would not recommend that you pick one and stick with it forever tho. Always do your own research. Sometimes a company will come out with a CPU that blows the competition out of the water. The next AMD CPU they come out with could be great at gaming, or the next Intel CPU could be great with multimedia. Always do your research, read and watch reviews. Talk to your peers, and trust your gut. If the other company has a better processor when it is time to upgrade your computer, feel free to go with that one. Pick the best product that suits what you need, not the brand.
Either one you choose will work for you, it is mainly just if you need to push it to its limits. But remember, some CPUs from either company could also just not be what you need and can be either overkill or not enough. So ask around and make sure you plan your build out before buying items.
A good rule of thumb, is to look at what you want to do, for example gaming. Look at the “recommended” specs, not the “minimum” specs. If you match or go higher than what the game “recommends”, you will be fine. If you go with the bare minimum needed. It can play the game but it might not be enjoyable. It might be slow, or the graphics may need to be turned wayyy down. On the other side tho, if you buy a CPU that is way to high it is kinda like having a F1 race car and deciding to only drive it in the city. Sure it will get you from place to place, but it is kinda a waste. It has been built to race and you will be keeping it at the speed limit of the city streets. Which is significantly lower than a race track.